True about adenocarcinoma of lung -a) More common in femaleb) Smoking is not associated withc) Central cavitationsd) Upper lobe involvement is most commone) Peripheral involvement

Adenocarcinoma of lung Adenocarcinoma is the most common lung cancer, overall. Also the most common type of lung cancer in women and nonsmokers. This is a malignant epithelial tumor with glandular differentiation or mucin production by tumor cells. Growth pattern may be any of the following Acinar       Bronchioalveolar Papillary Solid with mucin production The lesions are more peripherally located, and tend to be smaller (in contrast with squamous cell carcinoma in which lesions are larger and proximally, i.e., centrally located). Adenocarcinomas grow more slowly than squamous cell carcinomas but tends to metastatize widely and earlier. May be associated with area of scarring.